syzkaller login: [ 31.105260] BUG: Bad rss-counter state mm:000000009140bb57 type:MM_FILEPAGES val:33 [ 31.106635] BUG: Bad rss-counter state mm:000000009140bb57 type:MM_ANONPAGES val:22 [ 31.268649] ================================================================== [ 31.269935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.271097] Read of size 8 at addr ffff88800f56ab38 by task sshd/221 [ 31.272034] [ 31.272297] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.273349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.274631] Call Trace: [ 31.275033] [ 31.275384] dump_stack_lvl+0x91/0xf0 [ 31.275967] print_report+0xcc/0x620 [ 31.276567] ? __virt_addr_valid+0x102/0x340 [ 31.277226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277966] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278694] kasan_report+0xbe/0xf0 [ 31.279256] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.279980] vma_interval_tree_remove+0xc75/0xec0 [ 31.280694] vma_prepare+0xc54/0x11a0 [ 31.281265] __split_vma+0x5af/0x950 [ 31.281844] ? __pfx___split_vma+0x10/0x10 [ 31.282477] ? find_held_lock+0x2c/0x110 [ 31.283106] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.283796] ? lock_is_held_type+0x9f/0x120 [ 31.284460] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.285202] ? mtree_range_walk+0x632/0x900 [ 31.285875] ? mas_walk+0x5c7/0x7c0 [ 31.286359] do_vmi_munmap+0x1f1/0x2b0 [ 31.286854] mmap_region+0x1f9/0x2660 [ 31.287341] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287857] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288578] ? __pfx_lock_acquire+0x10/0x10 [ 31.289119] ? __pfx_mmap_region+0x10/0x10 [ 31.289678] ? security_mmap_addr+0x7d/0xa0 [ 31.290220] ? get_unmapped_area+0x1f5/0x3f0 [ 31.290770] do_mmap+0x854/0xf00 [ 31.291216] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.291717] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.292283] ksys_mmap_pgoff+0x3af/0x500 [ 31.292791] do_syscall_64+0x3f/0x90 [ 31.293273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293957] RIP: 0033:0x7fec7461cd82 [ 31.294422] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.296578] RSP: 002b:00007ffdf75f76a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.297513] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec7461cd82 [ 31.298359] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec73a56000 [ 31.299227] RBP: 00007fec73a56000 R08: 0000000000000009 R09: 0000000000001000 [ 31.300080] R10: 0000000000000812 R11: 0000000000000206 R12: 000056273a891b20 [ 31.300928] R13: 00007ffdf75f76c0 R14: 00007ffdf75f76f0 R15: 00007ffdf75f7a50 [ 31.301814] [ 31.302108] [ 31.302330] Allocated by task 214: [ 31.302770] kasan_save_stack+0x22/0x50 [ 31.303277] kasan_set_track+0x25/0x30 [ 31.303775] __kasan_slab_alloc+0x59/0x70 [ 31.304318] kmem_cache_alloc+0x16b/0x370 [ 31.304836] vm_area_dup+0x20/0x160 [ 31.305294] __split_vma+0x170/0x950 [ 31.305802] split_vma+0xc6/0x110 [ 31.306242] mprotect_fixup+0x8d2/0xb30 [ 31.306751] do_mprotect_pkey+0x87e/0xd40 [ 31.307278] __x64_sys_mprotect+0x78/0xc0 [ 31.307817] do_syscall_64+0x3f/0x90 [ 31.308302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308962] [ 31.309183] Freed by task 214: [ 31.309595] kasan_save_stack+0x22/0x50 [ 31.310098] kasan_set_track+0x25/0x30 [ 31.310602] kasan_save_free_info+0x2b/0x50 [ 31.311145] __kasan_slab_free+0x10a/0x190 [ 31.311685] kmem_cache_free+0x10d/0x4d0 [ 31.312199] rcu_core+0x8c8/0x2860 [ 31.312646] __do_softirq+0x1b7/0x7d4 [ 31.313129] [ 31.313346] Last potentially related work creation: [ 31.313951] kasan_save_stack+0x22/0x50 [ 31.314467] __kasan_record_aux_stack+0x8e/0xa0 [ 31.315040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.315682] remove_vma+0x139/0x170 [ 31.316142] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.316705] do_vmi_munmap+0x1f1/0x2b0 [ 31.317199] __vm_munmap+0x138/0x3a0 [ 31.317696] __x64_sys_munmap+0x59/0x80 [ 31.318204] do_syscall_64+0x3f/0x90 [ 31.318678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319327] [ 31.319544] The buggy address belongs to the object at ffff88800f56aae0 [ 31.319544] which belongs to the cache vm_area_struct of size 168 [ 31.321028] The buggy address is located 88 bytes inside of [ 31.321028] freed 168-byte region [ffff88800f56aae0, ffff88800f56ab88) [ 31.322477] [ 31.322699] The buggy address belongs to the physical page: [ 31.323379] page:000000000912f3d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf56a [ 31.324474] memcg:ffff88801bc22d01 [ 31.324904] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.325587] page_type: 0xffffffff() [ 31.326052] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.326982] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc22d01 [ 31.327901] page dumped because: kasan: bad access detected [ 31.328566] [ 31.328779] Memory state around the buggy address: [ 31.329376] ffff88800f56aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.330251] ffff88800f56aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.331111] >ffff88800f56ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331978] ^ [ 31.332616] ffff88800f56ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.333541] ffff88800f56ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.334399] ================================================================== [ 31.335762] Disabling lock debugging due to kernel taint [ 33.868669] BUG: Bad rss-counter state mm:00000000e5ddba2a type:MM_FILEPAGES val:33 [ 33.869991] BUG: Bad rss-counter state mm:00000000e5ddba2a type:MM_ANONPAGES val:22 [ 34.258266] BUG: Bad rss-counter state mm:000000006ab77f5e type:MM_FILEPAGES val:33 [ 34.259557] BUG: Bad rss-counter state mm:000000006ab77f5e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15225' (ECDSA) to the list of known hosts. 2023/06/19 16:52:52 fuzzer started 2023/06/19 16:52:52 dialing manager at localhost:44161 2023/06/19 16:52:52 checking machine... 2023/06/19 16:52:52 checking revisions... [ 35.018650] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:52:52 testing simple program... [ 35.060799] cgroup: Unknown subsys name 'net' [ 35.107170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:52:51 Registers: info registers vcpu 0 RAX=ffff8880160c18f8 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888014799b40 RSI=ffffffff818cfb98 RDI=ffff8880160c1988 RBP=ffff888018efc5e0 RSP=ffff88801477f870 R8 =ffff888018efc648 R9 =0000000000000000 R10=0000000000000001 R11=3830306234386136 R12=ffff888018efc670 R13=ffffffff818cf549 R14=ffff888018efc628 R15=0000000000000000 RIP=ffffffff8452fdf5 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fac9345b900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=0000559f9c021768 CR3=000000000d6d8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1b8f0c4a2166b80400000000000ae988 XMM05=5284b7b47bed2a6900000000001353e8 XMM06=00c3ffa147b8d8570000000000134488 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe68407ba8 CR3=000000000d778000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031353a32353a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a32353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000